NASCAR star Jimmie Johnson’s in-laws were found dead in what Oklahoma police are investigating as a murder-suicide on Monday. Muskogee police told TMZ that Jack and Terry Janway, parents of Johnson’s wife Chandra, and 11-year-old nephew Dalton Janway were found dead at the scene. Law enforcement officials consider Terry a suspect, though the incident is under investigation with no known motive. Officials found a body in a hallway of the home upon arrival and then heard another gunshot coming from inside the house. A 911 call made by an unidentified woman alerted authorities to someone with a gun at the home before hanging up the phone. Johnson and Chandra tied the knot in 2004 and have two daughters.